71
14.5.17 F91 (Refrigeration Cycle Abnormality)
Malfunction Decision Conditions
During cooling, compressor frequency = Fcmax.
During heating, compressor frequency > Fhrated.
During cooling and heating operation, running current: 0.65A < I < 1.65A.
During cooling, indoor intake - indoor pipe < 4°C.
During heating, indoor pipe - indoor intake < 5°C.
Multi Models Only
o
Gas shortage detection 1: A gas shortage is detected by checking the CT-detected input current value
and the compressor running frequency. During startup and operating of cooling and heating, input current
< 8.78/256 (A/Hz) x compressor running fre 0.25.
o
Gas shortage detection 2: A gas shortage is detected by checking the difference between indoor pipe
temperature and indoor intake air temperature during cooling and heating.
Malfunction Caused
Refrigerant shortage (refrigerant leakage).
Poor compression performance of compressor.
2/3 way valve closed.
Detection error due to faulty indoor intake air or indoor pipe temperature sensors.
Troubleshooting
Summary of Contents for CS-ME9PB4EA
Page 28: ...28 4 Location of Controls and Components 4 1 Indoor Unit 4 2 Outdoor Unit 4 3 Remote Control...
Page 29: ...29 5 Dimensions 5 1 Indoor Unit...
Page 30: ...30 6 Refrigeration Cycle Diagram...
Page 31: ...31 7 Block Diagram...
Page 32: ...32 8 Wiring Connection Diagram 8 1 Indoor Unit...
Page 33: ...33 9 Electronic Circuit Diagram 9 1 Indoor Unit...
Page 34: ...34 10 Printed Circuit Board 10 1 Indoor Unit 10 1 1 Main Printed Circuit Board...
Page 81: ...81 16 Exploded View and Replacement Parts List 16 1 Indoor Unit...
